import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.Timer;

/** 	 	 	 	 	 	
   This frame contains a moving rectangle.
*/
public class RectangleFrame extends JFrame
{
   private static final int FRAME_WIDTH = 300;
   private static final int FRAME_HEIGHT = 400;

   private RectangleComponent scene;

   class TimerListener implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         scene.moveRectangleBy(1, 1);
      }
   }

   public RectangleFrame()
   {
      scene = new RectangleComponent();
      add(scene);

      setSize(FRAME_WIDTH, FRAME_HEIGHT);
      
      ActionListener listener = new TimerListener();

      final int DELAY = 100; // Milliseconds between timer ticks
      Timer t = new Timer(DELAY, listener);
      t.start();      
   }
}